Fiendish, anyone?
I’ve just uploaded today’s puzzles. Be warned – the classic Sudoku that I posted should be rated as ‘fiendish’, I think. If you don’t think so, have a look, solve it and rate it yourself! Let us know what you…
Author: djape
Traveler. Tanguero. Sailor. Puzzle maker. PhD student. Computer Scientist. Author of over 70 puzzle books.
We’ve become Samurai
This is something very special: my first ever produced Samurai Sudoku puzzle. For those of you who haven’t come across these, it’s a Sudoku variation where there are 4 standard grids interconnected by another middle grid. So all together you…
More daily puzzles
In addition to today’s 3×3 Killer Sudoku that you are already used to seeing here, I’ve posted another puzzle on the Daily Sudoku variants Puzzles page. It’s a standard Sudoku, although not a classic 3×3 but rather a 2×5 variation.…
4×2 Killer Sudoku!
Today’s puzzle is not the ordinary 3×3 Killer Sudoku, but rather it’s a 4×2 variant. All rules remain the same, except that there are now only 8 digits used (1-8). NOTE:Since only 8 digits are used, the sum of all…
Weekend special!
I’ve prepared something special for Saturday’s puzzle, for two reasons: it’s a weekend and also it’s October 1 and I want to start with something brand new in October! It’s another variation of Killer Sudoku’s that I have never seen…
Was it too difficult?
Hmm, I might have overdone today’s puzzle… Maybe it was a little bit too hard? Any thoughts? Anyone solved it without using Perfect Sudoku? ANYONE? Anyhow, I promise tomorrow’s daily puzzle will be somewhat easier. Don’t give up! It’s a…
Today’s puzzle – Killer Sudoku X (diagonal)
As promised, today I’m posting something that I haven’t seen anywhere on the web – a diagonal Samunamupure. As far as I know it’s a world premier of this kind of puzzle – and you have the privilege to be…
The Rule of 45 of Killer Sudoku (innies and outies)
This tip is probably the most important solving technique of Killer Sudoku, one that will save you a lot of time. It does involve some math, but very simple one. Basically, the whole story is that you have to bear…
Killer Sudoku solving tip 2.
Ok I know that not everybody is good with math so here is a little tool that you could use to figure out different combinations of digits that could go into a ‘cage’. First enter the cage sum displayed in…
Samunamupure solving tip 1.
The following list contains ALL possible cage sums that have only one solution for the corresponding number of cells in the cage. You may use this list to help you solve Samunamupure puzzles: doubles 3=1+24=1+316=7+917=8+9 triplets 6=1+2+37=1+2+423=6+8+924=7+8+9 quads 10=1+2+3+411=1+2+3+529=5+7+8+930=6+7+8+9 5…